nst

/* see https://seriot.ch/projects/programming_in_postscript.html#2 */

/* Comments */
/*
comment.block
comment.block.documentation.tag
comment.line
comment.line.double-dash
comment.line.double-slash
comment.line.number-sign

nst

%!PS
%%Title: cpc2.ps
%%Creator: Nicolas Seriot

% January 2025
% Amstrad CPC Color Palette
% https://www.cpcwiki.eu/index.php/CPC_Palette
% https://seriot.ch/projects/drawing_with_computers.html
% https://bsky.app/profile/nst021.bsky.social/post/3leytevn6ck25

nst

%!PS
%%Title: cpc.ps
%%Creator: Nicolas Seriot

% January 2025
% Amstrad CPC Color Palette
% https://www.cpcwiki.eu/index.php/CPC_Palette
% https://seriot.ch/projects/drawing_with_computers.html
% https://bsky.app/profile/nst021.bsky.social/post/3leytevn6ck25

nst

%!PS
%%BoundingBox: 0 0 320 240

% gv -infoSilent anim.ps

/Courier findfont 12 scalefont setfont

/sleep { 100000 mul {} repeat } def

/x 100 def

nst

import pygame

pygame.init()

# 1 = en haut à droite
# 2 = en bas à droite
# 3 = en bas à gauche
# 4 = en haut à gauche

l_écran = 400

nst

import pygame as p
import random
R,r,W,H,G,N=range,random.randrange,480,320,3,5
g=[[r(W),r(H),r(W),r(H)]+[r(-9,9,2)for _ in R(4)] for _ in R(G)]
p.init()
s=p.display.set_mode((W,H))
f=lambda n,d,L:(n+(d:=d*(-1 if n+d not in R(L)else 1)),d)
while 1:
	s.fill([0]*3)
	for i,l in enumerate(g):

nst

const canvas = document.getElementById('lines');
const ctx = canvas.getContext('2d');

const W = canvas.width;
const H = canvas.height;
const G = 4, N = 6;

const rand = (max, step = 1) => Math.floor(Math.random() * max / step) * step;
const next = (line, vel) => line.map((p, i) => (vel[i] *= (p + vel[i] >= 0 && p + vel[i] < (i % 2 ? H : W)) ? 1 : -1, p + vel[i]));
const drawLines = (lines, ctx) => lines.forEach(l => ctx.stroke(new Path2D(`M ${l[0]} ${l[1]} L ${l[2]} ${l[3]}`)));

nst

import pygame as p
import random as m
R=range
r=m.randrange
S=(480,320)
def n(l,v):
	for i in R(4):
		v[i]*=-1+2*(l[i]+v[i]in R(S[i%2]))
	return[l[i]+v[i]for i in R(4)]
V=[[r(-9,9,2)]*4for _ in R(5)]

nst

import pygame as pg
import random as r

W, H = 800, 600
G, L = 4, 6

def next(l, v):
    for i in range(4):
        v[i] *= 1 if l[i] + v[i] in range(W if i % 2 == 0 else H) else -1
    return [l[i] + v[i] for i in range(4)]

nst

import pygame
import random

WIDTH = 800
HEIGHT = 600

NB_GROUPS = 5
HISTO_SIZE = 8
LINE_COLOR = (255,255,255)
BKG_COLOR = (0,0,0)